Shell scripts for controlling processes

processcontrol

#!/bin/bash
if pgrep
then
echo "exists";
else
echo "does not exist";
fi

#!/bin/bash
if pgrep -f '/usr/bin/mpd'
then
echo "running";
else
mpd &
sleep 2
pid=$(pgrep mpd)
sleep 10
echo $pid
kill $pid
fi

#!/bin/bash
pid=$(pgrep busftp)
while ps -p $pid; do
        sleep 1;
done ; node /procedures/update.js